Harrow.



No. 755,139. PATENTED MAR. 22, 1904. J. W. 6: G. D. KERR.

APPLICATION FILED JULY 17, 1903.

N0 MODEL. 2 SHEETS-SHEET 1.

PATENTED MAR. 22, 1904.

J. W. 6: O. D. KERR.

HARROW.

' BBHEETS-SHEET 2.

APPLICATION FILED JULY 17, 1903.

NO MODEL.

I I. v I! 8 o o i II 22 u wi/meom M THE NORRIS r-znzns co. FHOTO-LITHO..WAsHINGTON, o. c.

UNITED STATES Patented March 22, 1904.

PATENT OFFICE.

JOHN W. KERR AND COLWELL D. KERR, OF PLATEAU CITY, COLORADO.

HARROW.

SPECIFICATION forming part of Letters Patent No. 755,139, dated March22, 1904.

Application filed July 17, 1903.

To all whom it may concern:

Be it known that we, JOHN W. KERR and COL WELL D. KERR, citizens of theUnited States, residing at Plateau City, in the county of Mesa, State ofColorado, have invented certain new and useful Improvements in Harrows;and we do hereby declare the following to be a full, clear, and exactdescription of the invention, such as will enable others skilled in theart to which it appertains to make and use the same.

This invention relates to farm implements; and it has for its object toprovide an implement which will level the plowed ground, harrow theground, open a furrow, and pack the ground at the sides of the furrow, afurther object of the invention being to provide a specific constructionwhich will be simple and cheap of manufacture and efficient in itsoperation.

In the drawings, forming a portion of this specification, and in whichlike numerals of reference indicate similar parts in the several views,Figure 1 is a top plan view of the implement. Fig. 2 is a verticalsection taken longitudinally through the implement. Fig. 3 is a verticaltransverse section of the implement in advance of the disks lookingrear-- wardly. Fig. 4 is a horizontal section through the frame of themachine, parts of the mechanism being shown in top plan.

Referring now to the drawings, the present implement comprises aplurality of frames 5, each of which is rectangular in form, and whichframes are connected at their mutuallyadjacent sides by links 6, so thatsaid frames may have independent vertical movements. Transversely withineach frame and adjacent to the rear endthereof is disposed a roller 7,the axle 8 thereof having bearings in the sides of the frame, thesebearings being provided with the ordinary antifriction balls or rollers.The roller within each frame projects slightly below the lower edgethereof, and atthe center of each roller is a circumscribing flange 9,which is tapered to a sharp edge 10, so that as the implement is drawnalong the roller serves to roll the surface of the ground, while theflange of the roller of each frame forms a furrow. At the sides of eachframe, in ad- 5 .vance, of the roller 7 therein, are bearings 11 SerialNo. 165,939.- (No model.)

in the form of swinging boxes, and in these boxes are journaled theshafts 12 and 13 of The shafts are so positioned,

disks 14 and 15. that they aline to hold their disks parallel or may beshifted at various angles to each other,

so that the disks will stand at corresponding angles. To thus swing theshafts to change the positions of the disks with respect to each Ishafts of the disks at points adjacent to the latter.

A bow-shaped bar 15 is disposed transversely of each of the frames 5,with its ends attached to the sides of the latter, and attached to thecentral portion of. each of these bars is a notched segment 16, havingits opposite end attached to the front end of the frame and eccentric tothe shafts of the disks when thelatter are in alinement. The bifurcatedlever in each frame straddles this notched segment and receives thelatter in a guide 17 on the lever, so that when the lever is moved alongthe notched segment the shafts of the disks are swung pivotally, so thatwhile the vdisks are parallel and in spaced relation when the lever isat the rear limit of its movement the disks lie at an acute angle toeach other, with their front edges in close relation when the lever isat the forward limit of its movement. The lever is provided with a latch18 for engagement with the notched segment to hold the lever atdifferents points of its adjustment. 1

In the front of the frame are perforations 19, which are threaded andreceive clampingscrews 20, which are engaged through slots 21, formedvertically in a plate 22, which is disposed against the front of theframe. When the clamping-screws are loosened, the plate may be adjustedvertically, so that a greater or less portion thereof will depend belowthe front edge of the frame, the clamping-screws serving to hold theplate in its adjusted positions. The front of each frame is slightlyconvex and the scraper-platethereon is correspondingly bowed, so that inthe use of the plate, which serves to level the ground, the

dirt will be urged longitudinally of the scraperp ate.

It will be seen from the above description that in the use of thepresent implement the surface of the earth is scraped. It is thentreated by means of the disks and is finally rolled, so that the dirt iscompressed and a furrow is formed therein.

To draw the implement, suitable draft appliances are attached to thefronts of the frame, and it will be understood that any desired numberof frames may be employed, that modifications of the specificconstruction shown may be made, and that any suitable materials andproportions may be used for the various parts without departing from thespirit of the invention.

hat is claimed is A harrow comprising a frame, a roller journaledtransversely in the frame and having a circumscribing flange, disksmounted in advance of the flange of the roller and adjustable to lie atvarious angles, shafts for carrying the said disks, means for holdingthe disks in different adjusted positions consisting of a notchedsegment mounted eccentric of the said shafts when said shafts are inalinement, a bifurcated lever adapted to receive the notched segment andbearings for the said shaft on the extremities of the arms of thebifurcated lever, and bearings for the said shaft pivoted to the sidesof the said frame.

In testimony whereof we affix our signatures in presence oftwo'witnesses.

JOHN WQKERR. COLWELL n. KERR.

Witnesses:

J os. P. BALDRIDGE, LAURA

